Excavator.



A. G. BANSMER.

BXGAVATOR.

APPLIUATION FILED muur. 1912,

1,064,120, `Patented June 10, 1913. Mums-SHEET 1.

9 NVENTOR s se kto

l 65 bra at once that as the dipper arm' is swung upward, the trip willbe brought against the stop and thereby oscillated so that a pull willbe exerted on the chain 22 and the bolt released to permitthe door toopen and the contents of the bucket to be discharged. 0n one end of' theshaft or pivot 23, I provide a' 'cam 30 arranged to bear a ainst thelower end of a brake lever 31, vv ich is fulcrumed upon one or lboth ofthe side plates 24, andtproj'ects above the upper edge thereof, the`upper end of the lever being pivotally connected to the upper end of alink 32, which extends downwardly and forwardly between the side of thecarriage and the boom and has its. lower end pivoted to a brakeshoe'33,arranged to bear upon the rail 5' and engage between .the same and theforward supporting roller 26. It will readily be se`en that when thedipper arm is raised, the cam will release the brake lever sothat thebrake shoe will be free and the carriage may then travel along the boom.As the dipper arm is returned to a perpendicular position, the cam willbear upon the brake lever and actuate the same to apply the brake shoeso that the carriage will be locked to the boom whereupon the bucket maybe edectually operated to take up the dirt, gravel or other material tobe moved. By properly governing the time and speed of operation of thecables 11 and 14 at the engine, the movement of the boom, the carriage,and the bucket may be so adjusted as to lock the carriage to the boom atany point'aklgong the same and discharge the contents ofthe bucketwherever desired.

It will be noted that l have produced an apparatus which lis composed otfew parts and that the parts are simple in construction and compactlyarranged. The carriage isentirely automatic in its operation and is socombined with the boom that it can not liti slip transversely around thesame and does,

to be liable to interfere with the operatingcable orl the dipper arm. y

Should conditions require the use of a wooden boom, the construction.shown in so Figs. 4 and 5, may be employed.v In this arrangement, theWooden boom 34has anble bars 35, disposed along its sides at its loweredges to constitute track rails, these 'bars being rigidly securedto'hangers 36 passed over the boom at intervals along the same. The sideplates 37 of the carriage are inthe form of. channel bars connected attheir ends by transverse I-beams which are arranged close to the underside of the boom to hold eo the supporting rollers on the track rails@Wings 38 are secured to and dependfrom the side lates to providebearlngsfor the rock sha 't 39, upon which are mounted Ith'e l flipperarm, the door-releasing trip, and the e-controlling Caini When theapparatus is to be, subjected to very heavy strains, the constructionshown in F lgs. G and 7 may be, employed. In this form, instead of asingle I-beam, the boom is formed of a pair of angle bars 40,constituting the track rails, which are connected to the upperlongitudinal bars. 41, by truss bars or braces 42, disposed at the outersides of the rails, the bars 41 being connected by cross braces 43.Additional cross braces 44 75 may be provided at an intermediate pointbetween the rails, as shown best in Fig. 7, it deemed necessary.

It will readily be seen that the boom has an open bottom in thisconstruction and the brake lever is, therefore, arranged centrallybetween the side plates of the carriage instead of outside the same. fThe pivot pin 45 .inserted through the upper end of the lever .isextended to the sides of the carriage and there connected to the linkswhich carry the brake shoes. -The trigger for d1schag- "ing the contentsof the bucket is arranged outside Ithe carriage and may be duplicated atthe two sides, the stop being in the form f of a pin or lug 4G,projecting from the side of the carriage.

vrl`he operation of the apparatus will'be easily understood lfrom thelforegoing description. The parts being in the position shown in fulllines in Fig. l, if the cable 14 be gently slackened the carriage willdescend von the booml to any desired point. When this' point is reached,the cable is released so that the dipper arm swings vto a positionapproximately at a right angle to the boom, thereby operating the brakeso that further movement of the carriage along the boom will beprevented. The cable 1l is now paid out whereupon the boom will 41051swing downward and rest upon the dippe'r i arm, its weightserving tohold the bucket to its work, A forward pull upon the cable 14 will drawthe bucket through the earthor material being moved until the bucket 11dis filled and the boom is then drawn upward by means of the cable 11 atthe proper period of the operation so that by the time the trip lever isactuated to release the door of the bucket, the bucket will have beenswung to a position over the dumping point.

Having thus fully described my invention, what I claim as new and`desire to secure by Letters Patent of the United States, 15:- y In anexcavator, the combination of a boom having spaced. longitudinalflanges, a

'carriage traveling on4 said ianges, a'dipper -arln plvotally hung onsal-d carriage, a

bucket carried by said arm, means `:for acltuating the boom, means foroperating the `dip'per arm and to effect movement of the carriage alongthelfloom, and 'means controlled by the dipper arm tor locking thecarriage to the flanges on the boom.

maaien 2. In an excavator, the combination of a boom having spacedlongitudinal 'lanwes, a carriage traveling yon said llangee, a ipper armpivotally hung on said carriage, a bucket carried by said arm, means foractuating the boom, means for operatingr the dipper arm and to effectmovement o'4 the carriage along the boom, means controlled by the dipperarm for locking the carriage to the flanges of the boom, and meansccntrolled by the dipper arm to dischar ge th contents of the bucket. i

3. In an excavator, the combination ont a boom, a carriage mounted totravel thereon, a dipper arm hung nn the earriage,'a bucket carried bysaid arm, means `for aesaid arm, a closure for 'the bucket, a tripconsisting of an angle lever mounted on the support for the clipper arm,a connection between one arm of said lever and the closure, and a stopon the carriage in the path ot' the other arm of the lever.

4. In an excavator, the combination ofna boom, a carriage movabletherealong, a brake lever fulcrumed on the carnage, a brake shoeconnected with said lever and arranged to engage the boom, a dipper armhung on the carriage, and means movable with, the clipper arm andbearing on the brake lever to actuaite the same.

'5. ln an excavator, the combination of a boom, a carriage mounted totravel thereon, a brake lever on the carriage, a brake shoe connected tothe-nippel' end of the brake lever and adapted to engage the boom, arock shaft journaled in the carriage, a dipper arm secured to said rockshaft, and a cam on said shaft bearing against the lower end of thebrake lever.

6. In an excavator, the combinatienoi a boom, having spaced longitudinalflanges, a carriage mounted to travel on said flanges, a

`brake lever on the 'farriaga a brake shoe connected to the upper end ofthe brake le ver and adapted to engage the said flanges, a rock shaftjeurnaled in the carriage, a clip per arm secured to said rock shaft,and a cam on saidsha'ft bearing against the lo'wcr end of the brakelever.4

In testimony whereof I have signed my name `to this specification in the'presence of two subscribing witnesses.

ADOLPH GUSTAV BANSMER.

Witnesses J. Solmernn, Jr., JACOB Scn'anrnn.

